Vibrator.



PTENTED JULY 1, 1905.

(L E. l5-MKB@ VBRATUR APPLICATION 1111.151) s provided with screw-caps M and M", the latter having an integral shank m, the use for which has been hereinbefore described. Each of the screw-caps is fitted with a felt washer or other suitable packing, such as Y Y Y, to prevent the egress of lubricant. Oil-chamber Q is an ample repository for oil to insure the proper lubrication of the mechanism for an extended period of operation.

I prefer to make handle R of some suitable light material, such as choice wood, and fasten it to threaded ferrule R by means of bolt R, and secure said parts to casing C by said threaded ferrule R, as indicated in my drawings, although many other methods of attaching a convenient handle would answer the same purpose, and, in fact, a handle might be dispensed with entirely without impairing the practability or therapeutic importance of my invention.

The compensating' or yielding' guard J is provided with an integral Sleeve J', which is mounted over the cylindrical portion of casing C at C/ and is normally impelled forward to the cap M by the resiliency of the spiral spring K, which is housed in casing C and also mounted on said cylindrical portion of casing C in contact with iiange J" at the base of sleeve J. The operation of said guard J is such that it forms an instantaneous governor of the effective intensity of the blows or vibrations of the vibratrode or head L.

As shown, cam B is laid out to cause slide A to make two forward strokes at every revolution of driving-shaft D. Consequently if the drivingshaft makes three thousand revolutions per minute slide A will deliver six thousand forward strokes per minute. rlhis number may be increased or diminished, according' to the layout of the cam.

My apparatus may be varied in form without departure from my invention.

It is preferred to mount the shaft and slide so that their lengthwise axes may be in one and the same plane, so as to deliver the blows from the vibratrode at an end of the apparatus opposite that end thereof to which the power is applied. lf a handle is provided, it is preferably at an angle to the shaft and slide, as shown, and for the same reason. rlhis arrangement greatly facilitates the use of the apparatus. ln all other analogous apparatus known to me the vibratredes strike at right angles to the long way of the casing. The

guard may be made to yield under the pressure of the operator at his will in various ways other than by backing it with a spring, as shown, and in Fig. et, showing a modiiication,

the guard is of bell-shaped yielding material, as of rubber or the like, its shank l being rigl idly connected to the casing. The fold 2 in this ligure shows how the guard may be compressed under pressure of the operator to render the blows of the vibratrode harder or lighter on the skin or clothing of the patient against which the outer end of the guard is usually placed. Of course the guard maybe dispensed with, if desired.

In Figs. 2 and 3 a slight modilication of the cam and slide connection is shown, the camwheel B having a raised cam-rib 3, which works in the forked rib-receiving end 4 of the pin P in slide A.

As different sizes of vibratrodes will be used, some of which will be larger than that shown and of a diameter approximating the interior diameter of the guard, it is desirable to form air-escape passages or vents T at its inner end in order to prevent compression of air in the guard on the back stroke of the vibratrode, and consequently impeding its vibrations.

lVhat I claim ism l. The combination of a reciprocating vibratrode; ayielding guard therefor; and means for reciprocating' the vibratrode.

2. The combination of a reciprocating slide; a suitable guideway therefor; a cam; a cam connection between the cam and slide; means for rotating the cam and thereby reciprocating the slide; a vibratrode mounted on an outer end of the slide; a guard for the vibratrode; and a yielding bearing for the guard.

2). The combination of a casingformed with a chamber for a cam and its shaft and bearings and also formed with a chamberfor a reciprocatory slide and suitable guides therefor; a cam; its shaft and bearings therefor in the lirst-mentioned chamber; a reciprocatory slide and its guides in the secondmentioned chamber; said chambers opening into each other; a cam connection between the cam and slide whereby rotation of the shaft imparts reciprocatory movements to the slide; and packings in said chambers for retaining lubricant therein, thc lirstsmentioned chamber having a recess in which a yielding step for said shaft is mounted.

4C. rl`hc combination of a reciprocatory slide adapted to receive a vibratrode at an outer end; a vibratrode mounted on said outer end; and an inclosing guard for the vibratrode, the guard being outwardly flanged and having airvents at its inner end.

l n testimony whereof I afx my signature in presence of two witnesses.

CARROLL E. GATES.

ll'vitnesses:

EDWARD S. BEACH, E. A. ALLEX. 

